Lock.



A. A. PAGE.

LOCK.

APPLICATION FILED OCT. 24. 1914.

Patented May 4, 1915.

2 SHEETS-SHEET I @WQ/wg? 5 Y 7 A TTORNE y.

THE MORRIS PET -LITHOU WASHINCTUN4 D. r

A. A. PAGE.

LOCK.

APPucATloN FILED ocr. 24. 1914.

1,137,787. i mma my 4, 1915.

2 SHEETS-SHEET 2.

THE MORRIS PETERS CD., FHOTO-LITHO.. WASHINGTON, D. C

` trusion.

iran STATES PATEN- am@ ALBERT A. PAGE, OF EAST HAVEN, CONNECTICUT, AASSIGrNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION 0F CONNECTICUT.

lLock'.

Specication of Letters Patent.y

Patented May 4, 1915.

Application led October 24, 1914. Serial No. 868,400.

To all 'whom t may concern Be it known that I, ALBERT A. PAGE, a citizen of the United States, residing in East I-Iaven, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to locks, and more particularly to latch bolt locks for schoolhouses and other buildings, having means operable by a key whereby the latch bolt may be dogged in its retracted position so that when desired the door may be opened merely by pushing or pulling the same.

One of the primary objects of the present invention is to provide a lock having a cylinder lock mechanism of the ordinary pin tumbler type, operable from one side of the door by at least two differenty keys, together with mechanism which will dog ythe latch bolt in retracted position when said cylinder lock is actuated by one of said keys, without so clogging it when said cylinder lock mech-V anism is actuated by the other key, which latter key will retract the bolt but will not cause it to be held back in the inoperative position. Thus this last named key may be used by the teachers, or otherrk persons to whom it is not desired to give control of the latch dogging mechanism, while the lirst key can be retained by the janitor, or other authorized person to whom it is desired to give such control. hood of the teachers key beingfso used as to leave the door in unlocked condition at a time when it should be locked againstin- Usually the janitors key will be operative to retract the latch bolt, as well as to dog it in the retracted position, but this is not necessary in all aspects of the invention. It will be understood that both keys are used in connection with the same cylinder, which is preferably at the outside of the door, and the teachers key is, for all practical purposes, a change key, while the janitors key is in a sense a master key.

Another object of the invention is to provide a lock in which the latch bolt, after being dogged in retracted position by the master key, cannot be released by the change key. In other words, the release of the latch Therefore there is no likeli-V bolt from Vits dogged position, as well as the dogging of the same in retracted position, is confined to the master key. A still further objectwhich I have in view 1s the provision of a lock in which a single cylinder is so constructed and arranged relative to the lock parts that one of the rollbacks will dog and release the latch, while another rollback will not, under any conditions, perform any function except that of withdrawing the latch to open the door.v

Tok these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is an elevation of a lock embodying my improvements, with the cap plate removed, the

section similar to Fig. 3, showing the janitors key inserted into the cylinder lock; Fig. 6 is a fragmentary view of the lock mechanism showing how the teachers key isinoperative to release the latch bolt from its dogged position; and Fig. 7 comprises an edge view of the main retracting leverand a face view thereof.

Referring to the drawings, the case 10kk of the lockV having the face plate 11 contains a latch bolt 12 normally projected by a spring 13. The stem 111 of the bolt carries a head 15 engaged by a lever 16 adapted to be operated `by a lifter 17, which is in turn actuated by an inside thumb piece, push bar, or other mechanism (not shown). The particular means for retracting the latch bolt manually from the inside of the door is immaterial. In the particular lock selected for illustration, the retraction of the bolt from the outside of the door is confined to the key, but this is likewise an immaterial featureso far as this invention is concerned.

The means for retractingV the latch bolt tracting lever 20, pivoted in the case at 21,

26. The extremity 24a of the arm v24v ex-` tends transversely across the case in operative relation to a bit, dog or rollback 27 of a cylinder lock 28k inserted in a suitable opening in the case, usually at the outside of the door. The cylinder lock 28 also has another bit, dog or rollback 29 rotatable in a plane oiset from the plane'of the projection 2.4Y and4 adapted to engage the free end 30 of a lever 31, pivoted in the case at 32.

The end 30,01? lever 3'1 loosely rests onl and is supported by a lateral projection 33 on the lever 20. The parts are so arranged that when the bit or rollback 29l iswturned in a counter-clockwise direction with respect to' Fig. 1, it will be unablel to contact withV the projection 24a of lever 25,' but will, on `,the other hand, depress the lever 31; and actuate `the lever 2O to retract the latch bolt without moving-'the lever 25, as shown moreparticularly inFig.l 2.

The cylinder drawing is provided with a key plug 34 surrounded byy an eccentric sleeve 35. .The ordinary pin tumblers 36 coperate with this key.

l plugand sleeve in the customarymanner, as shown.A In `the particular form illustrated,

the bity or rollback v27 is secured to-.the key plug 34 by'means ofthe screws 37, while they bit. or Vrollback 29, is secured to the sleeve by the screws 38. It will be obvious that the centerof rotation of the key plug and there` fore of .the rollback 27 is somewhat lowerY v than Vthecenter of rotationl of the sleeve35 40.

andV rollback 29.

The arm 24 of thelever V25 is made of `special shape so that as said arm is actuated bythe rollback 27, it may koperate to hold thelatchbolt-in itsretracted position. y To* thisend, the edge portion ofthe arm 24, Vco-l acting with thei-projection 23 of the Vlatch bolt lever, is formed with a shoulder 39 having inclined edges 40, 41 directed at an angle toeach other to create a pointed projection,

as shown. Asfthe latch bolt is retracted by the lever 25, lthe edge 40ct said-shoulder or projectiony bears against the projection23 when the arm 24 moves toward the right V` with reference to Fig. 1. Asthe movement security withwhich the latch bolt' is dogged.y

yin this position, the detent lever 25 is Vprolck 28 illustrated in the vided with a rearwardly directed extension 42, which as the projection 23 passes fromY Vone iside' to the other of the shoulder 39, "snaps into positionin front of the cross-head 15 and. engages saidcrosshead frictionally,

Vas shown in F ig.-4. ln Vthisl manner, the

latch bolt is held securely in retracted position, and it will remain in said position until the rollback 27 is rotated in a direction opposite to that first indicated, in order Vto cause the abutment of the rollback 27 against the opposite side of the projection 24a and the release of the lever 25, whereuponthe parts will be restored by the latch bolt spring tothe initial position.

The teachers key, or change key 39, is adapted to rotate the key plug 34 and sleeve 35 together, and' consequently it rotates both rollbacks 27 and 29 at the same time. These rollbacks in this case both rotate about the axis` of the sleeve, as will be understood. When the rollbacks are rotated in a counterclockwise direction with reference to Fig. l, the latch. bolt will be retracted by means olE the levers y 31 and 20, as Vhereinbefore described, without affecting the detent lever 25, so that as a consequence the teachers key is inoperative tov hold the latch bolt retracted by meansof said detent lever. The latch bolt is fully retracted before the rollback 27 reaches the extremity 24a of the lever 25,

shown in Fig..2. j y

The masterkey, or janitors key 40, rotates the'keyplug 34 individually, and hence when said key is inserted and turned in the lock the rollback 27 will be actuated, but

the Vrollback 29 will remain stationary.Y

ThenV the rollback 27v is rotated in a counterclockwise direction with respect to Fig. 1, it willY abut` the extremity 242L of the lever 25 and actuate said'y lever 25 in a manner previously described so as to first retract the vlatch bolt by means of the lever 20, andy then Vdog it in theretracted position.`

1 Referring to rei-g. la Win be noa-.a that the parts-are so arranged that when the rollf back.V 27 is rotated inthe oppositedirection, the-latch 'bolt^ mayfbe released, as previ-i Y ously described. However, when they latch Y -bolt has been dogged' inthe retracted posi-` tion by means of `the master key 40, the i change key39 is ineective toy release the.

bolt,'because saidl change key rotates both rollbacks 27 and 29 on the axis of the sleeve 25, and in thiscase the-rollback 27 will clear the lever 25, as shown 'inv Fig. 6,.being in-j capable of reaching the same. It will beV understood, therefore, that while the change.

owing to the-fact that( the master key actu-' ates the detent lever as well as theA reisotracting lever` 20. The release ofthe latch bolt from its dogged position is also conined t0 the master key owing to the fact that when the change key is rotated in a clockwise direction with respect to Fig. 1, neither rollback will be operative to release the detent lever.

I have not attempted to describe all of the modifications of the construction which may be adopted Within the scope of the invention as defined in the claims.

I do not claim herein the specilic means for retracting the latch bolt from one side oi' the door by means of a key acting on a detent member, as set forth in my co-pending application, Serial No. 710,570; nor do I cla-im broadly herein a lock having a latch bolt, a retracting member therefor, a detent member for dogging the bolt in retracted position, a key to operate both ot said members, and a key to operate the retracting member alone, as claimed in another copending application Serial No. 804,215.

`What I claimis 1. In a lock, a latch bolt, retracting mechanism therefor, detent mechanism for dogging the bolt in retracted position, a cylinder lock at one side of the door, a key for said cylinder lock adapted to retract the latch bolt and dog it in retracted position, and another key for said cylinder lock operative to retract the latch bolt but inoperative to dog it in retracted position; substantially as described.

2. In a lock, a latch bolt, retracting mechanism therefor, detent mechanism for dogging the bolt in retracted position, a cylinder lock, a key operative on said retracting mechanism and on said detent mechanism through said cylinder lock, and another key operative on said retracting mechanism alone through said cylinder lock; substantially as described.

3. In a lock, the combination of a latch bolt, a cylinder lock at one side of the door, a plurality of keys adapted to said cylinder lock, and mechanism operable by one of said keys to retract the latch bolt and dog it in retracted position, said mechanism being operative by another of said keys to the eX- tent of retracting thed bolt, but inoperative by said second key to dog the bolt; substantially as described.

fl. In a lock, the combination of a latch bolt, a cylinder lock, a plurality of rollbacks operable by said cylinder lock, means actuated by one of said rollbacks to dog the latch bolt in retracted position, and means actuated by another rollback to retract the bolt, but inoperative to dog it in retracted position; substantially as described.

5. In a lock, the combination of a latch bolt, a cylinder lock, tvvo rollbacks carried by said cylinder lock and forming permanent parts thereof, means operable by one of said rollbacks to' dog the latch bolt in retracted position, and means operableby the other rollback to retract the bolt Without clogging it in retracted position; substantially as described.

V6. In a lock, the combination of a latch bolt, a cylinder lock, two rollbacks carried by said cylinder lock, means actuated by one of said rollbacks to retract the bolt, and means actuated by the other rollback to dog the bolt in retracted position; substantially as described.

7. In a lock, the combination of a case, a latch bolt therein, a cylinder lock secured to the case at the outside of the door, tWo rollbacks carried by said cylinder lock Within the case, means actuated by one of said rollbacks to retract the bolt and dog it in retracted position, and means actuated by the other rollback to retract the bolt Without dogging it in retracted position; substantially as described.

8. In a lock, a latch bolt, a cylinder lock, a plurality of keys adapted to said cylinder lock, and mechanism operable by one of said keys to retract the bolt and hold it retracted, and operable in part by another of said keys to retract the bolt Without holding it retracted; substantially as described.

9. In a lock, a latch bolt, retracting mechanism therefor, detent mechanism for dogging the bolt in retracted position, a cylinder lock, a key for said cylinder lock operative on both of said mechanisms, and another and dil'erent key for said cylinder lock operative on said retracting mechanism alone; substantially as described.

10. In a lock, a latch bolt, retracting mechanism therefor, mechanism for dogging the bolt in retracted position, a cylinder lock having a key plug and a sleeve surrounding the key plug, a rollback actuated by the key plug, and a rollback actuated by the sleeve, one of said rollbacks operative on both the retracting mechanism and the clogging mechanism, and the other rollback operable on the retracting mechanism alone; substantially as described.

11. In a lock, a latch bolt, retracting mechanism therefor, mechanism for clogging the bolt in retracted position, a rollback to actuate the dogging mechanism, and a rollback to actuate the retracting mechanism, in combination with a cylinder lock having a key plug mounting one .of said rollbacks, and provided with a sleeve surrounding the key plug and mounting the other rollback; substantially as described.

12. In a lock, a latch bolt, a retracting lever therefor, and a detent lever adapted to'operate the retracting lever, in combination With a cylinder lock having a rollback to operate said levers together, and another rollback to operate the retracting lever independently; substantially as described` 13. Ina lock, the .combination of a latch bolt, pin tumblerV lock mechanism, a pluralityof keys adapted to said pin tumbler lock mechanism, and mechanism operable by one of said keys toV retract the latch bolt and dog it in retracted position, said 4mechanism being operative by another of said keys tor the extent of retracting the bolt, but inoperative by said second key to dog the bolt in tumbler lock mechanism, a key operative on retracted position, said second key beingY also inoperative to release the bolt from v its dogged position; substantially as described.

14:. ln' a lock, a latch bolt, retracting mechanism therefor, detent mechanism for clogging the bolt in retracted position, pin

mechanism therefor, detent mechanism for dogging the bolt in retracted position, a key to retract the latch bolt, dog it in retracted position, and release it from dogged position, and another key operable to retract the latch bolt but inoperative to dog it in retracted position, or release it from its dogged position; substantially as described; 16. In a lock, a latch bolt, a retracting lever therefor, a detent lever adapted to operate the retracting lever, and a pin tumbler Y lock mechanism having a rollback to operate the detent lever, and another rollback to operate the retracting lever independently, said detent lever being inoperative in'either direction by said second rollback; subst-air;`

tially as described.

y17. In a lock, a;

mechanism therefor, detent. mechanism for clogging the bolt in retracted position,apin

latch bolt, retracting tumbler lock Ymechanism having Vtwo roll- Y backs, a key operative on one of said rollbacks to dog the bolt in retractedposition, anda second key operative ony the other roll-v back to retract the vbolt Without dogging it in retracted position, said ysecond key being inoperative to release the boltV from its dogged position; substantially as described.

18. In a lock, the combination of a latch bolt, a cylinder lock,-tWo rollbacks carried by said cylinder lock, means' actuated' by one of said rollbacks'to retract the bolt, and

means actuated bythe other rollback to dog the bolt in retracted position, said bolt being releasable from its dogged position by said second rollback only; substantially as described. f Y

19. In a lock, the combination of case, a`

the bolt from its dogged position, and means f i actuated by the other rollback to retract the bolt Without clogging it in retractedy position, said other rollback being inoperative to release thebolt from its doggedposition; substantially as described. Y.

In Witness whereof, I'have hereunto set my hand on the 22nd day of Gctober, 1911i. ALBERT A. PAGE.

Viitnesses: v

Y MABEL A; Busse,-

Annrr M. LoNes'TErN.

Copies of this patent may be obtained for five cents each, by addressing" the Commissioner f Patents,

' Washington, D. C. Y f 

